Apologies for my late response to your question.
I bought our motorhome in early summer this year and the seller told me the batteries were three years old. I ordered my lithium a week after purchase but the shipping date from China had been put back. The previous owner looked after the batteries and I took a 8 week summer break with them and as I said in the listing they worked faultlessly. Our delayed Roamer battery finally arrived and is now installed; hence the sale. Succinctly from knowledge they are 3.6 years old.
I have just looked at the stamp marks on top of the batteries but there is nothing that I can read as a date, I understand manufacturers often code dates to hide the manufacture date from the retail date.
So in truth I’ve no idea
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I bought our motorhome in early summer this year and the seller told me the batteries were three years old. I ordered my lithium a week after purchase but the shipping date from China had been put back. The previous owner looked after the batteries and I took a 8 week summer break with them and as I said in the listing they worked faultlessly. Our delayed Roamer battery finally arrived and is now installed; hence the sale. Succinctly from knowledge they are 3.6 years old.
I have just looked at the stamp marks on top of the batteries but there is nothing that I can read as a date, I understand manufacturers often code dates to hide the manufacture date from the retail date.
So in truth I’ve no idea